Twenty-nine-year-old Sayfullo Saipov is in police custody after being accused of using a Home Depot truck as a weapon of terror in lower Manhattan.

On Tuesday, Saipov allegedly plowed into pedestrians on a bike lane not far from the 9/11 memorial. The horrific attack killed eight and injured over a dozen others.

Sometime during his murder spree, Saipov reportedly shouted, “Allah Akbar!” It didn't take long for New York Mayor Bill de Blasio to comment about the tragedy, calling it an “act of terror.”

Saipov would purportedly end up crashing his vehicle into a school bus and facing off with the NYPD. But he wouldn't make it far. Instead, he suffered a gunshot wound to the stomach from an NYPD officer responding to the scene.

The driver who plowed into a group of people on Tuesday, killing 8, left behind handwritten notes pledging loyalty to ISIS along with an image of an ISIS flag inside his vehicle.

Sayfullo Saipov, 29, had the notes written in Arabic inside his Home Depot rental truck along with a picture of the ISIS flag, according to law enforcement sources.

The handwritten notes indicated the he had pledged allegiance to the terror group, the sources said.

Saipov isn't the first terrorist to pledge his allegiance to ISIS and carry out an act of terror in the United States. Omar Mateen, who gunned down 49 people at Pulse in Orlando, Florida, called 911 to pledge his allegiance to the vicious jihadist group.

Still, even with ISIS on the run in Iraq and Syria, sympathy for its sick cause remains alive and well.

In the meantime, local and federal enforcement are pouring their resources and time into the investigation.

“The Department is closely monitoring the situation and working with our federal, state and local partners in responding to and investigating this tragedy,” the Department of Homeland Security said.